Kototani-ike (Japanese: 琴谷池) is an earthfill dam located in Kagawa Prefecture in Japan.

The dam is used for flood control and irrigation.

The dam impounds about 1 ha of land when full and can store 65 thousand cubic meters of water.

The construction of the dam was started on 1985 and completed in 1987.

This article about a dam or floodgate on Shikoku, Japan is a stub.